Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van thi hoi snippets" » "van thi code snippets", "van tai hoi snippets", "dan thi hoi snippets", "van thu hoi snippets", "van thi hoai snippets", "van thi choi snippets", "van thi hai snippets"
"python using java snippets" » "python using data snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("van thi hoi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van thi hoi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van thi hoi snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van thi hoi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.